linux-toradex.git/include/linux/blkdev.h, branch v2.6.27.50

Enforce a minimum SG_IO timeout

2008-12-13T23:29:14+00:00

commit f2f1fa78a155524b849edf359e42a3001ea652c0 upstream.

There's no point in having too short SG_IO timeouts, since if the
command does end up timing out, we'll end up through the reset sequence
that is several seconds long in order to abort the command that timed
out.

As a result, shorter timeouts than a few seconds simply do not make
sense, as the recovery would be longer than the timeout itself.

Add a BLK_MIN_SG_TIMEOUT to match the existign BLK_DEFAULT_SG_TIMEOUT.

Suggested-by: Alan Cox 
Acked-by: Tejun Heo 
Acked-by: Jens Axboe 
Cc: Jeff Garzik 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

block: disable sysfs parts of the disk command filter

2008-09-11T12:20:23+00:00

We still have life time issues with the sysfs command filter kobject,
so disable it for 2.6.27 release. We can revisit this and make it work
properly for 2.6.28, for 2.6.27 release it's too risky.

Signed-off-by: Jens Axboe

block: remove blk_queue_tag_depth() and blk_queue_tag_queue()

2008-08-27T07:50:20+00:00

They are unused and ->busy doesn't exist anymore.

Signed-off-by: Jens Axboe

block: rename blk_scsi_cmd_filter to blk_cmd_filter

2008-08-27T07:50:19+00:00

Technically, the cmd_filter would be applied to other protocols though
it's unlikely to happen. Putting SCSI stuff to request_queue is kinda
layer violation. So let's rename it.

Signed-off-by: FUJITA Tomonori 
Signed-off-by: Jens Axboe

block: move cmdfilter from gendisk to request_queue

2008-08-27T07:50:19+00:00

cmd_filter works only for the block layer SG_IO with SCSI block
devices. It breaks scsi/sg.c, bsg, and the block layer SG_IO with SCSI
character devices (such as st). We hit a kernel crash with them.

The problem is that cmd_filter code accesses to gendisk (having struct
blk_scsi_cmd_filter) via inode->i_bdev->bd_disk. It works for only
SCSI block device files. With character device files, inode->i_bdev
leads you to struct cdev. inode->i_bdev->bd_disk->blk_scsi_cmd_filter
isn't safe.

SCSI ULDs don't expose gendisk; they keep it private. bsg needs to be
independent on any protocols. We shouldn't change ULDs to expose their
gendisk.

This patch moves struct blk_scsi_cmd_filter from gendisk to
request_queue, a common object, which eveyone can access to.

The user interface doesn't change; users can change the filters via
/sys/block/. gendisk has a pointer to request_queue so the cmd_filter
code accesses to struct blk_scsi_cmd_filter.

Signed-off-by: FUJITA Tomonori 
Signed-off-by: Jens Axboe

block: add a blk_plug_device_unlocked() that grabs the queue lock

2008-08-01T18:31:32+00:00

blk_plug_device() must be called with the queue lock held, so callers
often just grab and release the lock for that purpose. Add a helper
that does just that.

Signed-off-by: Jens Axboe

block: Trivial fix for blk_integrity_rq()

2008-07-16T21:51:41+00:00

Fail integrity check gracefully when request does not have a bio
attached (BLOCK_PC).

Signed-off-by: Martin K. Petersen 
Signed-off-by: Linus Torvalds

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6

2008-07-15T18:15:36+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (80 commits)
  ide-floppy: fix unfortunate function naming
  ide-tape: unify idetape_create_read/write_cmd
  ide: add ide_pc_intr() helper
  ide-{floppy,scsi}: read Status Register before stopping DMA engine
  ide-scsi: add more debugging to idescsi_pc_intr()
  ide-scsi: use pc->callback
  ide-floppy: add more debugging to idefloppy_pc_intr()
  ide-tape: always log debug info in idetape_pc_intr() if debugging is enabled
  ide-tape: add ide_tape_io_buffers() helper
  ide-tape: factor out DSC handling from idetape_pc_intr()
  ide-{floppy,tape}: move checking of ->failed_pc to ->callback
  ide: add ide_issue_pc() helper
  ide: add PC_FLAG_DRQ_INTERRUPT pc flag
  ide-scsi: move idescsi_map_sg() call out from idescsi_issue_pc()
  ide: add ide_transfer_pc() helper
  ide-scsi: set drive->scsi flag for devices handled by the driver
  ide-{cd,floppy,tape}: remove checking for drive->scsi
  ide: add PC_FLAG_ZIP_DRIVE pc flag
  ide-tape: factor out waiting for good ireason from idetape_transfer_pc()
  ide-tape: set PC_FLAG_DMA_IN_PROGRESS flag in idetape_transfer_pc()
  ...

block: unexport blk_end_sync_rq

2008-07-15T19:21:45+00:00

All the users of blk_end_sync_rq has gone (they are converted to use
blk_execute_rq). This unexports blk_end_sync_rq.

Signed-off-by: FUJITA Tomonori 
Cc: Borislav Petkov 
Signed-off-by: Jens Axboe 
Signed-off-by: Bartlomiej Zolnierkiewicz

block: add blk_queue_update_dma_pad

2008-07-04T07:52:13+00:00

This adds blk_queue_update_dma_pad to prevent LLDs from overwriting
the dma pad mask wrongly (we added blk_queue_update_dma_alignment due
to the same reason).

This also converts libata to use blk_queue_update_dma_pad instead of
blk_queue_dma_pad.

Signed-off-by: FUJITA Tomonori 
Cc: Tejun Heo 
Cc: Bartlomiej Zolnierkiewicz 
Cc: Thomas Bogendoerfer 
Cc: James Bottomley 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe